The global success of the song, “Gangnam Style”, by the Korean rapper PSY in 2012, was an exogenous shock to investor enthusiasm for DI Corp., a Korean semiconductor manufacturer. Although DI Corp.'s business is not related to the entertainment industry, its co-CEO is the father of PSY....

How do investors respond to geopolitical risk events? The South Korean stock market gives an interesting testing ground because the nuclear weapons testing and military aggressions by its belligerent neighboring country, North Korea, are exogenous. Moreover, as North Korea has transitioned from...